The latest CPU cooler from Glacialtech, the Siberia, reminds me of the old Thermalright XP-120, and XP-90. The big difference is that the Siberia uses two fans, one 140mm fan on top and one 92mm on the bottom. Most heatsinks with two fans position the fans perpendicular to the motherboard so the exhaust is blowing into the exhaust case fan. Siberia's fan position is the old standard, parallel to the motherboard.

The included 140mm fan can be tuned with PWM from 800-1400rpm while the 92mm fan on the bottom is fixed at 1300rpm.